A proteomic approach of pediatric astrocytomas: MiRNAs and network insight
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- 作者：Ruth Ruiz Esparza-Garrido ; Miguel 脕. Vel谩zquez-Flores ; Jaime Diegop茅rez-Ram铆rez ; Enrique L贸pez-Aguilar ; Georgina Siordia-Reyes ; Magdalena Hern谩ndez-Ortiz ; 脕ngel G. Mart铆nez-Batallar ; Sergio Encarnaci贸n-Guevara ; Fabio Salamanca-G贸mez ; Diego Julio Arenas-Ar ; a
- 关键词：Pediatric astrocytoma ; Proteomic ; Protein&ndash ; protein interactions ; Hub proteins ; Novel miRNAs
- 刊名：Journal of Proteomics
- 出版年：6 December, 2013
- 年：2013
- 卷：94
- 期：Complete
- 页码：162-175
- 全文大小：1938 K
文摘
Pediatric astrocytomas, a leading cause of death associated with cancer, are the most common primary central nervous system tumors found in children. Most studies of these tumors focus on adults, not on children. We examined the global protein and microRNA expression pattern by 2D SDS-PAGE, mass spectrometry (MALDI-TOF), and RT2 miRNA PCR Array System. Proteomic studies revealed 49 proteins with changes on the expression. Interactome showed that vimentin, calreticulin, and 14-3-3 epsilon protein are hub proteins in these neoplasms. MicroRNA analyses demonstrated for the first time novel microRNAs involved in the astrocytoma biology. In conclusion, our results show that novel proteins and microRNAs with expression changes on pediatric astrocytoma could serve as biomarkers of tumor progression.
Biological significance
Astrocytomas are tumors that progress rapidly and that invade surrounding tissues. Although some drugs have been developed to treat these neoplasms, the mortality of patients is still very high. In this study, we describe for the first time, to our knowledge, some proteins and miRNAs associated with the biology of astrocytic tumors that could be postulated as possible diagnostic or prognostic biomarkers. Altogether, our results indicate that large-scale analyses allow making a fairly accurate prediction of different cellular processes altered in astrocytic tumors.